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Message-Id: <20240905115918.772234-1-wutengda@huaweicloud.com>
Date: Thu, 5 Sep 2024 11:59:16 +0000
From: Tengda Wu <wutengda@...weicloud.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: song@...nel.org,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
kan.liang@...ux.intel.com,
linux-perf-users@...r.kernel.org,
linux-kernel@...r.kernel.org,
bpf@...r.kernel.org
Subject: [PATCH -next v2 0/2] perf stat: Support inherit events for bperf
Hi,
bperf (perf-stat --bpf-counter) has not supported inherit events
during fork() since it was first introduced.
This patch series tries to add this support by:
1) adding two new bpf programs to monitor task lifecycle;
2) recording new tasks in the filter map dynamically;
3) reusing `accum_key` of parent task for new tasks.
Thanks,
Tengda
Changelog:
---------
v2: (Address comments from Namhyung)
* Remove the unused init_filter_entries in follower bpf, declare
a global filter_entry_count in bpf_counter instead
* Attach on_newtask and on_exittask progs only if the filter type
is either PID or TGID
v1: https://lore.kernel.org/all/20240904123103.732507-1-wutengda@huaweicloud.com/
Tengda Wu (2):
perf stat: Support inherit events during fork() for bperf
perf test: Use sqrtloop workload to test bperf event
tools/perf/tests/shell/stat_bpf_counters.sh | 2 +-
tools/perf/util/bpf_counter.c | 32 +++++++--
tools/perf/util/bpf_skel/bperf_follower.bpf.c | 70 +++++++++++++++++--
tools/perf/util/bpf_skel/bperf_u.h | 5 ++
4 files changed, 95 insertions(+), 14 deletions(-)
--
2.34.1
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